Joseph balsley



No. 62|,7 8l. Patented Mar. 28,1899.

, J. BALSLEY.

BURGLAR' ALARM.

(Application filed Nov. 25, 1898.)

(No Model.)

Inf/622257", (703675 Bab Z0 W magmas, (Ta/15 5 fid- NrTED STATES PATENTnron.

JOSEPH BALSLEY, OF INDIANAPOLIS, INDIANA.

BU RG LAR-ALARM.

SPECIFICATION forming part of Letters Patent No. 621,781, dated March28, 1899.

Application filed November 25,1898. erial No. 697,411. (No model.)

necessary to turn the knob before the door can be opened.

The object of this invention is to provide an alarm which will besounded by the rotation, whether to the right or to the left, of thedoor-knob, thereby frightening the intruder away before even thebeginning of an entrance-way has been effected.

The object also is to provide an alarm which will keep on sounding untilit runs down or is stopped by some one on the inside of the house orroom.

The object also is to provide a device which can be quickly andremovably attached to any door-knob.

A further object is to provide a simple, cheap, and durable device, suchas will be hereinafter fully described and claimed.

I accomplish the objects of the invention by the mechanism illustratedin the accompanying drawings, in which- Figure 1 is a perspective viewof my invention in its silent position on a door-knob spindle; Fig. 2, afront elevation of same in full lines in its ringing position and indotted lines in its silent position, Fig. 3, a view in side elevation ofthe alarm on the knob-spindle; Fig. 4, a transverse section on thedotted lines a 4 of Fig. 2; Fig. 5, a detail in vertical central sectionof the clockwork bell-ringing mechanism; Fig. 6, a front View of samewith the gong of the bell removed; Fig. 7, an under side view of theplate shown in Fig. 6, to which the works are secured Fig. 8, a modifiedconstruction showing the tripping-lever (in dotted lines) inside of thecase; and Fig. 9, a reverse side of the plate shown in Fig. 8, with thetripping-lever in full lines.

means of removably securing the device to the knob-spindle, I bifu'rcatethe lower end of the body, thereby providing the prongs b and 19,between which the spindle will be located, and a fixed attachmentsecured by the set-screw 5 The top end of this body part will be reducedin width and thickness to provide a tongue b which will slip into a loop0 on the back side of the bell-housing 0, con tained within which is aspring actuated clockwork which rings a bell upon the inward movement ofa push-button or stop D.

Formed integral with or screwed onto or otherwise secured to the body Bis a shelf B, which will have a central depression to make a seat for aspherical weight E. In practice I prefer to use an eye-screw, such as isshown in Fig. 4, for this shelf. I prefer a spherical weight because itis less liable to be interfered with by obstructions and will move morereadilythat is, be more sensitive in its actionthan a weight of anyother shape, and the central depression of the shelf holds the weightagainst accidental displacement when the alarm is in upright position.

Pivotally secured to the body between the bell and the. shelf is a lever.F, one end of which is in contact with the push D. The outer end of thelever is connected, by means of the chain or other flexible attachmentG, with the weight E. When the body or standard'of the alarm is turnedout of a vertical position, as shown in Fig. 2, the weight rolls offtheshelf and hangs suspended from the lever, thereby forcing one end of thelatter against the push, which liberates the bellringing mechanism, andthough the knob may be turned back the weight will not be taken off ofthe lever, and the bell will continue to ring until its spring has rundown or until the weight has been lifted onto its shelf by some oneinside.

The bell-ringing mechanism comprises a coiled spring an escapement-wheelO rotated from the spring by gear-wheels 1, 2, 8, and 4, and anescapement or arbor Ciworkin g in the wheel 0 and having a hammerGfiwhich strikes the gong 0 A second spring (3 has a tongue 0 whichengages the hammer-stem and holds it against movement until liberated bythe push D, previously referred to, which is fastened to the spring 0whereby pressure upon the push D presses the spring out of engagementwith the hammer-stem.

In the modification shown in Figs. 8 and 9 thelever F is mounted insideof the bell-housing, and its short arm presses against thehammer-locking spring to liberate the hammer without the intervention ofthe push, which is therefore omitted.

Having thus described my invention, what moved by the weight to releasethe clockwork and ring the bell substantially as described.

2. The combination of a bell rung by clockwork, a stop to check theringing of the bell, a lever to move the stop in a direction to releasethe clockwork and ring the bell, all of said mechanism being mountedvertically over the spindle of a door-knob,and connected therewithwhereby the turning of the spindle will move the bell-ringing mechanismfrom its vertical position over the spindle, a knobspindle, a weightreleased by the rocking of the spindle and attached to the lever,whereby, when the weight is released, the lever will be moved by theweight to release the clockwork and ring the bell, substantially asdescribed.

3. The combination, of a door-knob spindle, a superimposed bell rung byclockwork, a stop to check the ringing, a lever to release the stop anda weight to move the lever in a direction to release the stop, saidweight being supported vertically above spindle and liberated to act onthe lever when thrown out of its vertical position by the rocking of thespindle, substantially as described.

In witness whereof I have hereunto set my hand and seal, atIndianapolis, Indiana, this 22d day of November, A. D. 1898.

JOSEPH BALSLEY.

\Vitnesses:

CARL SCHLEGEL, Josnrn A. l\/IINTURN.

